Wilo-Flumen OPTI-RZP 20 ... 40

Recirculation pump: Submersible mixer, directly driven with attached flow housing.

• Recirculation between nitrification and denitrification in the biological wastewater treatment
• Returning return activated sludge to the activated sludge tank or for sludge treatment
• Water circulation for aquaculture (fish farming)
• Special applications

For pumping in commercial areas of:

• Sewage containing faeces
• Return activated sludge
• Process water

• Thermal motor monitoring with bimetallic strip
• Flow housing
• Operation with frequency converter possible

• Mains connection: 3~400 V, 50 Hz
• Fluid temperature: 3 … 40 °C (37 … 104 °F)
• Submerged operating mode: S1
• Protection class: IP68
• Insulation class: H
• Max. switching frequency: 15/h
• Max. immersion depth: 20 m (66 ft)

• Motor housing: 1.4408 (ASTM A 351) or EN-GJL-250 (ASTM A48 Class 35/40B)
• Seal housing: 1.4408 (ASTM A 351)
• Seal:
  • On the motor side: SiC/SiC or NBR (nitrile)
  • Fluid side: SiC/SiC
• Propeller: 1.4408 (ASTM A 351)

Hydraulics

Propeller made of solid material with clogging-free propeller geometry. Pump in non-clog design flow housing with guide claw and two flange claws. The guide claw ensures smooth function when lifting and lowering the recirculation pump. The flange claws can be readjusted, ensure optimum centring on the discharge pipe and stabilise the recirculation pump at high operating pressure.

Alternative version with flange connection for direct screwing to the discharge pipe.

Motor

Surface-cooled submersible motor in three-phase current design with permanently lubricated und large-size rolling bearings. The motor winding is equipped with temperature monitoring. The motor heat is given off directly to the surrounding fluid via the motor housing. The connection cable is designed for heavy mechanical loads, sealed water pressure-tight against the fluid and is sealed longitudinally watertight. The connection cable has bare cable ends and is 10 m (33 ft) long as standard.

Seal

Large-volume sealing chamber with double shaft sealing. The sealing chamber is filled with white oil and absorbs the leakage from the seal on the fluid side. A corrosion- and wear-resistant mechanical seal is used on the fluid side. The seal on the motor side involves either a rotary shaft seal or a mechanical seal.

• Recirculation pump with attached flow housing and connection cable
• Installation and operating instructions

• Thermal motor monitoring as temperature controller and temperature limiter
• Thermal motor monitoring with PTC sensor
• Fluid temperatures up to 60 °C (140 °F), depending on the motor type and motor capacity
• Sealing chamber monitoring
• Ex-rated in accordance with ATEX, FM and IEC-Ex
• Ceram coating for housing parts made of grey cast iron

• Lowering device
• Auxiliary lifting device
• Cable bollard to secure the hoist cable
• Additional rope anchoring
• Fixation sets with anchor bolts

• Thermal motor monitoring with bimetallic strip
• Flow housing
• Operation with frequency converter possible

• Mains connection: 3~400 V, 50 Hz
• Fluid temperature: 3 … 40 °C (37 … 104 °F)
• Submerged operating mode: S1
• Protection class: IP68
• Insulation class: H
• Max. switching frequency: 15/h
• Max. immersion depth: 20 m (66 ft)

• Motor housing: 1.4408 (ASTM A 351) or EN-GJL-250 (ASTM A48 Class 35/40B)
• Seal housing: 1.4408 (ASTM A 351)
• Seal:
  • On the motor side: SiC/SiC or NBR (nitrile)
  • Fluid side: SiC/SiC
• Propeller: 1.4408 (ASTM A 351)

Hydraulics

Propeller made of solid material with clogging-free propeller geometry. Pump in non-clog design flow housing with guide claw and two flange claws. The guide claw ensures smooth function when lifting and lowering the recirculation pump. The flange claws can be readjusted, ensure optimum centring on the discharge pipe and stabilise the recirculation pump at high operating pressure.

Alternative version with flange connection for direct screwing to the discharge pipe.

Motor

Surface-cooled submersible motor in three-phase current design with permanently lubricated und large-size rolling bearings. The motor winding is equipped with temperature monitoring. The motor heat is given off directly to the surrounding fluid via the motor housing. The connection cable is designed for heavy mechanical loads, sealed water pressure-tight against the fluid and is sealed longitudinally watertight. The connection cable has bare cable ends and is 10 m (33 ft) long as standard.

Seal

Large-volume sealing chamber with double shaft sealing. The sealing chamber is filled with white oil and absorbs the leakage from the seal on the fluid side. A corrosion- and wear-resistant mechanical seal is used on the fluid side. The seal on the motor side involves either a rotary shaft seal or a mechanical seal.

• Recirculation pump with attached flow housing and connection cable
• Installation and operating instructions

• Thermal motor monitoring as temperature controller and temperature limiter
• Thermal motor monitoring with PTC sensor
• Fluid temperatures up to 60 °C (140 °F), depending on the motor type and motor capacity
• Sealing chamber monitoring
• Ex-rated in accordance with ATEX, FM and IEC-Ex
• Ceram coating for housing parts made of grey cast iron

• Lowering device
• Auxiliary lifting device
• Cable bollard to secure the hoist cable
• Additional rope anchoring
• Fixation sets with anchor bolts